Supergirl will be showing us a little Mercy next season: Rhona Mitra (The Last Ship) is joining the Season 4 cast of The CW’s superhero drama in a season-long recurring role as villainess Mercy Graves, our sister site Deadline is reporting. RELATEDSupergirl Casts TV’s First Transgender Superhero for Season 4 Mitra’s recent roles include TNT’s […]
